Ink cartridge



FIG. 1 is a perspective view of an ink cartridge;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof, the bottom view being the same;

FIG. 4 is a side view thereof, the opposite side view being the same; and,

FIG. 5 is a rear view thereof. 

The ornamental design for an ink cartridge, as shown and described. 